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Sildenafil (By mouth)

Treats erectile dysfunction. Also treats pulmonary arterial hypertension (high blood pressure in the lungs).

What works?

Learn more about the effects of these drugs. The most reliable research is summed up for you in our featured article.

Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where this enzyme works. Erectile dysfunction is a condition where the penis does not harden… Read more
Brand names include
Revatio, Sildenafil, Viagra
Other forms
By injection
Drug classes About this
Antihypertensive, Peripheral Vasodilator, Erectile Dysfunction Agent

What works? Research summarized

Evidence reviews

Treatments with Viagra (Sildenafil citrate)  for erectile dysfunction in male patients aged more than 18 years old with multiple sclerosis

Erectile dysfunction (ED) is a common sexual disease in male patients with multiple sclerosis (MS). Viagra (Sildenafil citrate) is considered as an effective drug for  the treatment of ED in the general population, but it has not been systematically reviewed in patients with MS.

Phosphodiesterase 5 (sildenafil) inhibitors for pulmonary hypertension

Pulmonary hypertension (PH) is high blood pressure in the lung circulation. It can occur without a known cause, or it can be caused by another lung disease or be secondary to abnormalities in the left side of the heart. The review sought to determine whether there was evidence that sildenafil (also known as Viagra), a drug which opens up the arteries and increases the flow of blood, could decrease pulmonary artery blood pressure and alleviate symptoms of PH. A limited number of studies of short term i duration indicated that the drug can open up the arteries. One small longer‐term study found some favourable effects in terms of symptoms, but in the absence of longer term outcomes, we could not establish whether this meant that the people given the drug felt that their levels of daily activity were better. Future studies should be longer in duration, and should measure the impact of treatment on daily activities, mortality, quality of life and exercise capacity.

Sildenafil for pulmonary hypertension in neonates

When a baby is born, pressure in the blood vessels of the lungs is high, and when normal breathing is established, this pressure starts to fall. In some babies, this transition does not occur and pressure remains high; this does not allow blood to go to the lungs to get adequate oxygen. This situation is called persistent pulmonary hypertension of the neonate (PPHN). Other events can lead to development of high pressure in lung blood vessels that can manifest within a few days after birth. Persistent high pressure in these vessels leads to delivery of less oxygen to all organs of the body. A medication called sildenafil may cause lung blood vessels to relax, allowing improved blood flow and improved delivery of oxygen to all organs.

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Summaries for consumers

Treatments with Viagra (Sildenafil citrate)  for erectile dysfunction in male patients aged more than 18 years old with multiple sclerosis

Erectile dysfunction (ED) is a common sexual disease in male patients with multiple sclerosis (MS). Viagra (Sildenafil citrate) is considered as an effective drug for  the treatment of ED in the general population, but it has not been systematically reviewed in patients with MS.

Phosphodiesterase 5 (sildenafil) inhibitors for pulmonary hypertension

Pulmonary hypertension (PH) is high blood pressure in the lung circulation. It can occur without a known cause, or it can be caused by another lung disease or be secondary to abnormalities in the left side of the heart. The review sought to determine whether there was evidence that sildenafil (also known as Viagra), a drug which opens up the arteries and increases the flow of blood, could decrease pulmonary artery blood pressure and alleviate symptoms of PH. A limited number of studies of short term i duration indicated that the drug can open up the arteries. One small longer‐term study found some favourable effects in terms of symptoms, but in the absence of longer term outcomes, we could not establish whether this meant that the people given the drug felt that their levels of daily activity were better. Future studies should be longer in duration, and should measure the impact of treatment on daily activities, mortality, quality of life and exercise capacity.

Sildenafil for pulmonary hypertension in neonates

When a baby is born, pressure in the blood vessels of the lungs is high, and when normal breathing is established, this pressure starts to fall. In some babies, this transition does not occur and pressure remains high; this does not allow blood to go to the lungs to get adequate oxygen. This situation is called persistent pulmonary hypertension of the neonate (PPHN). Other events can lead to development of high pressure in lung blood vessels that can manifest within a few days after birth. Persistent high pressure in these vessels leads to delivery of less oxygen to all organs of the body. A medication called sildenafil may cause lung blood vessels to relax, allowing improved blood flow and improved delivery of oxygen to all organs.

See all (12)

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